Answer:
The events usually teach the reader a moral lesson.
Explanation:
I'm not sure, so don't come at me if I'm wrong, just trying to help :)
The sentence that contains a helping/auxiliary verb is the first one - We should stop and ask for directions.
The helping verb there is <em>should. </em>Helping verbs are used to form complex tenses, such as present continuous, or future perfect, etc.